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Jetty example source code file (JSONDateConvertor.java)

This example Jetty source code file (JSONDateConvertor.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Jetty tags/keywords

datecache, datecache, gmt, jsondateconvertor, jsondateconvertor, object, object, output, simpledateformat, simpledateformat, string, text, unsupportedoperationexception, util

The Jetty JSONDateConvertor.java source code

package org.mortbay.util.ajax;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Map;
import java.util.TimeZone;

import org.mortbay.log.Log;
import org.mortbay.util.DateCache;
import org.mortbay.util.ajax.JSON.Output;

/* ------------------------------------------------------------ */
/**
* Convert a {@link Date} to JSON.
* If fromJSON is true in the constructor, the JSON generated will
* be of the form {class="java.util.Date",value="1/1/1970 12:00 GMT"}
* If fromJSON is false, then only the string value of the date is generated.
*/
public class JSONDateConvertor implements JSON.Convertor
{
    private boolean _fromJSON;
    DateCache _dateCache;
    SimpleDateFormat _format;

    public JSONDateConvertor()
    {
        this(false);
    }

    public JSONDateConvertor(boolean fromJSON)
    {
        this(DateCache.DEFAULT_FORMAT,TimeZone.getTimeZone("GMT"),fromJSON);
    }
    
    public JSONDateConvertor(String format,TimeZone zone,boolean fromJSON)
    {
        _dateCache=new DateCache(format);
        _dateCache.setTimeZone(zone);
        _fromJSON=fromJSON;
        _format=new SimpleDateFormat(format);
        _format.setTimeZone(zone);
    }
    
    public Object fromJSON(Map map)
    {
        if (!_fromJSON)
            throw new UnsupportedOperationException();
        try
        {
            synchronized(_format)
            {
                return _format.parseObject((String)map.get("value"));
            }
        }
        catch(Exception e)
        {
            Log.warn(e);  
        }
        return null;
    }

    public void toJSON(Object obj, Output out)
    {
        String date = _dateCache.format((Date)obj);
        if (_fromJSON)
        {
            out.addClass(obj.getClass());
            out.add("value",date);
        }
        else
        {
            out.add(date);
        }
    }

}

Other Jetty examples (source code examples)

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